Gravity SGP40 Air Quality Sensor

This Gravity module from DFRobot measures volatile organic compounds (VOC) in indoor air with the Sensirion SGP40 sensor. Together with Sensirion's VOC algorithm it delivers a VOC index from 0 to 500 that rates the air quality directly without calibration. The sensor needs only 2.6 mA, responds within 2 s and is connected via I2C to 3.3 V and 5 V boards. Libraries are available for Arduino and for Python on the Raspberry Pi.

Note: The VOC index is calculated from the measured ethanol equivalent, it is not a CO2 reading.

Note: The connection cable can be converted to male pins with a Dupont cable M-M, so that it also fits an Arduino UNO.

Recommended Accessories:

• Dupont Cables M-M 10cm 20 Pieces

Features:

• VOC index 0 to 500 for direct rating of indoor air
• Temperature and humidity compensation in the chip, no calibration needed
• More accurate with humidity and temperature values from an additional sensor
• Current consumption only 2.6 mA
• Gravity I2C connector, 3.3 V and 5 V

Application Examples:

• Retrofitting air purifiers and kitchen hoods
• Demand-controlled ventilation
• Thermostats
• Indoor air quality monitoring

Documentation:

• Wiki DFRobot
• Arduino library (GitHub)
• Schematic (PDF)
• Datasheet (PDF)

Technical Data:

• Manufacturer: DFRobot
• Manufacturer SKU: SEN0394
• Sensor: SGP40 (Sensirion)
• Supply: 3.3 V to 5 V
• Operating current: 2.6 mA
• Preheat time: 10 s
• Response time: 2 s
• Interface: I2C, address 0x59
• VOC index: 0 to 500
• Measuring range: 0 to 1000 ppm ethanol equivalent
• Operating temperature: -10 °C to 50 °C
• Storage temperature: 5 °C to 30 °C
• Humidity: 0 to 90 % RH
• Connections: VCC, GND, SCL, SDA
• Dimensions: 20 × 22 mm
• Weight: 12 g

Scope of Delivery:

• 1× Gravity SGP40 Air Quality Sensor
• 1× Gravity I2C/UART sensor cable